The RMS undertook a progressive upgrade in stages of the Great Western Highway from Lapstone to Katoomba from about 1990 to 2016. From around 2009-2012 it undertook the upgrade through the town centre of Lawson, involoving the demolition of the commercial centre shops, widening of the Highway and significant landscaping. This project involved the installation of a carpark in front of the new shopping centre separated from the highway shoulder by a narrow landscaped strip. A decision was made by the RMS, with the encouragement of Council’s Urban Designer and the RMS’ consultants HBO+EMTB, to construct the planting strip to provide adequate root volume, deep aeration and stormwater polishing.
Lawson, Great Western Highway, Shopfront planting – Quercus palustris
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Case Study Description
Design &/or as constructed detail
Soil MIx A (to 300mm depth): 30% imported topsoil, 50% coarse sand, 20% organic matter, + amendments
Soil mix B: (subsoil)40% imported topsoil, 60% coarse sand.
Note detail included on plan V01
Hard paved surface with compacted subgrade as per engineering details
24 months establishment maintenance – none subsequently. Note two trees at the eastern end were demolished buy a car and have been replaced.None
Would not have been possible without an enlightened RMS project manager and an excellent consultant